It is low.
The opposite of not high is high.The opposite of high is low.
Low is the opposite of high.
the opposite world of high is low.
The opposite of lowest is highest. Just like how the opposite of low is high.
High is the opposite to low. His opinion was the opposite to his mother, so they could not agree. Thankfully, his day turned out to be the complete opposite to what he expected.
The homophone for the opposite of "low" is "high." This pair of words sound the same when spoken aloud but have opposite meanings.
it is high tide
it is high tide
The opposite would be high, with specific terms being raised, increased, or elevated.
Jonin are high ranking ninjas, the opposite would be academy students.
The opposite of sober (unimpaired) would be inebriated, drunk, high, or intoxicated. The opposite of sober (serious) would be frivolous, flippant, or farcical.
How about low?